Drive Pinion Shaft

A: DISASSEMBLY





1. Straighten the staked portion of the lock nut, and remove the lock nut while locking the rear spline portion of the shaft with Special Service Tool(SST)1 and (SST)2. Then pull off the drive pinion collar.
SST1 498937100 HOLDER
SST2 499787100 WRENCH

NOTE:
Remove the O-ring





2. Using a press, separate the rear roller bearing and outer race from the shaft.





3. Using a press and SST, separate the front roller bearing from the shaft.
SST 498517000 REPLACER

B: INSPECTION
Make sure that all component parts are free of harmful cuts, gouges, and other faults.

C:ASSEMBLY





1. Measure dimension "u (traction)" of the drive pinion shaft.





2. Using a press, force-fit the roller bearing in position.

CAUTION: Do not change the relative positions of the outer race and bearing cone.

3. After fitting the O-ring to the shaft, attach the drive pinion collar to the shaft.

CAUTION: Be careful not to damage the O-ring.





4. Tighten the lock washer and lock nut with SST1.
SST1 498937100 HOLDER

Actual tightening torque:
113 ± 5 Nm (11.5 ± 0.5 kg-m, 83.2 ± 3.6 ft. lbs.)

NOTE:
- Pay attention to the orientation of lock washer.
- Tightening torque using torque wrench is determined by the following equation:

T1 =(72.2/(L + 72.2))x T
T: Actual tightening torque

- Install SST2 to torque wrench as straight as possible.
SST2 499787100 WRENCH





5. Measure the starting torque of the bearing. Make sure the starting torque is within the specified range. If out of the allowable range, replace the roller bearing.

Starting torque:
0.3 - 2.0 Nm (3 - 20 kg-cm, 2.6 - 17.4 ft. lbs.)





6. Stake the lock nut securely at two places.
7. Measure dimension "B" of the drive pinion shaft.





8. Determine the thickness t (mm) of the drive pinion shim.

t = 6.5 ± 0.0625 - (B -A)

NOTE: The number of shims must be three or less.